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Paper detail

A deterministic algorithm to compute the cosine measure of a finite positive spanning set

Originally developed in 1954, positive bases and positive spanning sets have been found to be a valuable concept in derivative-free optimization (DFO). The quality of a positive basis (or positive spanning set) can be quantified via the {\em cosine measure} and convergence properties of certain DFO algorithms are intimately linked to the value of this measure. However, it is unclear how to compute the cosine measure for a positive basis from the definition. In this paper, a deterministic algorithm to compute the cosine measure of any positive basis or finite positive spanning set is provided. The algorithm is proven to return the exact value of the cosine measure in finite time.

preprint2020arXivOpen access
Warren HareGabriel Jarry-Bolduc
math.OC
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Warren HareGabriel Jarry-Bolduc

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